Lightning started the Dragon Bravo Fire on July 4, 2025. The fire was burning in the ponderosa pine forest within the northern national park boundaries, consuming 5,000 acres. The entire North Rim of the Grand Canyon was closed. The fire had burned between 50 and 80 structures on the North Rim, according to park officials.

Parts of Grand Canyon National Park remained closed to the public Sunday because of wildfires and the release of chlorine gas from a North Rim water-treatment facility, the National Park Service said.

The inner canyon, including Phantom Ranch, was closed, as were trails to the inner canyon, because a water treatment facility on the North Rim was damaged by fire and was leaking chlorine gas, park officials said. Chlorine gas is toxic and is heavier than air, meaning it could settle into the lower part of the canyon.